Cool, but could use more
Pretty cool overall, I had fun with it. But it would seem that there is room to add more. For example, if the different colors of blocks you bounce off of had different attributes (ie. one is springy and sends you highers, one makes you bounce really low, one instantly changes the direction of gravity) or make combos out of them (ie hit three red ones and get a score bonus).
I did enjoy the game, just thought I would throw some suggestions in there.